The answer is B. to record. "To" is always a part of an infinitive.
I hope that helps!
The answer is B. to record. "to" is always a part of an infinitive. I hope it help for all my hard work
The infinitive in the sentence is "to record," which identifies the action to be taken. Option B is the correct choice. The last word of the infinitive phrase is "voice," but the focused answer for the infinitive itself is what's specified in option B.
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